Link to song and work for learning b and d. Teach kids to "make a bed:" fists with thumbs up; put fists together and thumbs become headboard and footboard of a bed. Left fist forms the b, and right fist forms the d.
Alphabet boxes are wonderful tools to use when introducing letters and letter sounds. Students begin to associate letters with the objects in the alphabet boxes. Students can investigate the contents of the boxes during center time.